DE102013110734A1 - Method for producing a shape and shape for bending machining - Google Patents

Abstract

Provision of a lower mold (die), which enables damage-free processing when bending sheet metal. The structure is such that slot milling is carried out at two points on the surface of the semicircular, rotatable metal bars 6 and 7 arranged symmetrically on the left and right, and urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers 1, 2, 3,. 4 is inserted or embedded.

Description

The present invention relates to a method for producing a mold for bending work in sheet metal processing according to the preamble of claim 1 and a mold for bending work.

Sheet metal bending is a process in which metal plates made of iron, stainless steel, aluminum, etc. are bent in a bending machine called a bending press on which an upper mold (mandrel) and a lower mold (die) are attached. In the case of iron bending, the iron raw material is interposed between the upper mold (mandrel) and the lower mold (die), and the bending work is performed with friction at both edges of a V-shaped lower mold (die) to cause bending damage ,

It is possible, after the bending processing by post-processing or coating treatment to reduce the bending damage or to make inconspicuous. Even in the case of bending of stainless steel or aluminum caused in the same way damage. But in the case of stainless steel and aluminum, the bent product is the final product and the reality is that it is not possible to perform a finishing or coating treatment.

In order to prevent damage to these stainless steel and aluminum materials after bending, conventional bending work was performed after bonding a blue or white vinyl tape to the underside of the material to be damaged, so that no damage could occur. But as the vinyl tape stuck to the material, there was the problem that the bending angle could not be precisely maintained. In addition, it was necessary to remove the vinyl adhesive tape after bending, resulting in additional costs and expense. Furthermore, it happened that in the summer, the splice of the vinyl adhesive tape remained on the material and the distance was consuming.

Still further, as another method for preventing damages, the bending work was carried out while adhering no vinyl tape to the material but unfolding a urethane film, a cloth or the like on the V-shaped lower mold (die). Again, by the influence of the urethane film, the cloth o. Ä. The bending angle could not be met precisely and beyond the duration of the possible use was short, so that frequent replacement was required. There has been proposed a new lower mold (die) for bending, which realizes many years in the bending processing of sheets for impossible held work without damage.

Against this background, the object of the present invention is to allow a damage-free processing in the bending processing of sheets.

The object is achieved in that at two points on the surface of left and right symmetrically arranged semicircular rotatable metal rods, a slot milling is performed and inserted into these grooves urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers / embedded , The object is further achieved by a lower mold (die) for bending with the features of claim 2.

Advantageous embodiments of the invention are the subject of the dependent claims.

The size of the grooves in two places on the surface of the semicircular rotatable metal rod is such that the width is 0.1 to 10 mm from the right edge of the semicircular shape and 0.1 to 10 mm from the left edge and the depth 0.1 to 10 mm ,

The substance to be inserted, such as urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers, is provided to be 0.1 to 10 mm in length and 0.1 to 10 mm in transverse direction from the surface of the semicircular metal rotary rod 0.1 to 2 mm.

Embodiments will be explained in more detail with reference to the accompanying drawings. Show it:

1 a schematic front view of an upper mold, a lower mold and a material to be bent before bending,

2 a schematic front view of an upper mold, a lower mold and a material to be bent after bending.

In 1 a state is shown in which the material is embedded over the embedded in the grooves of the lower mold (mold) of the left and right symmetrically arranged semicircular rotatable metal rods, such as urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers, was placed. With the reference numerals 1 . 2 . 3 , and 4 from 1 are urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers, 5 denotes the material 6 and 7 are the semicircular rotatable metal rods (lower mold: die) and 8th is the upper form (thorn).

In 2 the state is shown in which the material has been embedded over the lower mold (mold) of the left and right symmetrically arranged semicircular rotatable metal rods in which urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers have been embedded, was placed and by the upper mold (mandrel) a bending work was performed.

In 2 becomes the upper form (thorn) 8th lowered, it comes with the material 5 in contact, is further lowered and, while the left and right symmetrically arranged semicircular rotatable metal rods 6 and 7 turning, becomes the material 5 bent. The inserted or embedded substance 1 . 2 . 3 . 4 such as urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers, prevents friction on the bottom surface of the material 5 so that the bending work can be carried out without causing damage.

The embedded or embedded in the grooves of the lower mold (mold) of the left and right symmetrically arranged semicircular rotatable metal rods, such as urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers acts as a buffer during bending, whereby the formation of Damage to the bottom of the material can be prevented.

LIST OF REFERENCE NUMBERS

1

Urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers

2

Urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers

3

Urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers

4

Urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers

5

Material (sheet metal)

6

semicircular rotatable metal rod (lower mold: die)

7

semicircular rotatable metal rod (lower mold: die)

8th

upper form (thorn)

Claims (5)

Method for producing a lower mold (template) for bending metal sheets, characterized in that symmetrically arranged semicircular rotatable metal rods (2) are arranged at two points on the surface of left and right 6 . 7 ) groove grooving is performed and urethane, resin, rubber, carbon fibers, silicone, polyester or fibers are embedded in these grooves. Lower mold (die) for bending, characterized in that at two points of the surface of symmetrically arranged left and right semicircular rotatable metal rods ( 6 . 7 ) Grooves are milled, and in these grooves urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers ( 1 . 2 . 3 . 4 ) is inserted or embedded. Bending bending die (die) according to claim 2, characterized in that the size of the grooves at two left and right locations of the surface of the semicircular rotatable metal rods ( 6 . 7 ) is dimensioned so that the width is 0.1 to 10 mm from the right edge of the semicircular shape and 0.1 to 10 mm from the left edge and the depth 0.1 to 10 mm. A bending bent metal die according to claim 2 or 3, characterized in that the substance placed in the two left and right locations of the surface of the semicircular rotatable metal rods ( 6 . 7 embedded), urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers ( 1 . 2 . 3 . 4 ). Bending bending die (die) according to claim 4, characterized in that the size of the substance to be inserted or embedded, such as urethane, synthetic resin, rubber, carbon fibers, silicone, polyester or fibers ( 1 . 2 . 3 . 4 ) is provided so as to extend along 0.1 to 10 mm and transversely 0.1 to 10 mm from the surface of the semicircular rotatable metal rod ( 6 . 7 ) 0.1 to 2 mm.

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